Lubricating means for sewing machines



Nov:- 3,1942. J. BRUSSELL 1 2,300,826

\ LUBRICATING: MEANS FOR SEWING MACHINES I Filed Dec.- 30, 1939 INVENT OR. 14605 BRUSSZ'ZZ ATTORNEY.

Patented Nov. 3, 1942 LUBRICATING MEANS FOR SEWING MACHINES Jacob Brussell, New York, N. Y. Application December 30, 1939, Serial No. 311,888 3 Claims. (01. 112-256) This invention relates to new and useful improvements in lubricating mechanism for sewing machines, and more particularly to high speed machines used for various purposes such as for sewing of buttons and the like, as illustrated in my Patents Nos. 2,175,247 and 2,175,248, issued October 10, 1939.

In high speed sewing machines which run at several thousand R. P. M., and containing a considerable number of moving parts, it is quite essential that adequate lubrication of said parts at all times be had. In accordance with priorconstructions, such lubrication was haphazard and unsatisfactory, and in any case it was quite troublesome to keep the sewing machine adequately lubricated while attempting to use the same in high speed quantity production. In some types of machines, it is necessary to quickly and accurately stop the operation of the machine at predetermined intervals, and for this purpose there is provided a stop mechanism. The nature and character of such a mechanism is important and in the past it has been rather unsatisfactory due to several reasons. Among them is that the mechanisms did not stop the rotation of the machine at a predetermined-exact point, and also in many cases the mechanism was not sufiiciently sturdy to withstand long use under severe conditions of operation.

The present invention is intended and adapte to overcome the difiiculties and disadvantagesheretofore encountered in sewing machines and to provide a stop mechanism which is simple, sturdy and effective.

It is also among the objects of the present invention to provide a system for lubricating sewing machines which is automatic in operation, which is simple in construction, and which effectively lubricates all of the essential parts of the sewing machine without any attention being given to the same by the operator. i

In the accompanying drawing, constituting a part hereof, and in which like reference characters indicate like parts,

Fig. 1 is a side elevational view of a sewing machine constructed in accordance with the present invention, some parts being broken away and some parts being shown in section for clearness;

Fig. 2 is a top plan View of the oil reservoir constituting a part of the present machine; and

Fig. 3 is a fragmentary, elevational view, partly in cross-section, of one of the essential elements of the stop mechanism.

Referring to the drawing, the sewing machine comprises the usual bed I, standard 2, overhangtions.

ing arm 3, and head 4. The main shaft- 5 has member 6 secured thereto and pulley 1, having a flange 8, secured thereto, a pin 9 projecting from member 6 into flanged portion 8 bearing against shock absorbing springs therein (not shown). An idler pulley l0 alongside the driving pulley l is provided with a bracket H held by screw I 2. The needle bar I3 is reciprocated by the usual connection from shaft 5. 7

On the main shaft 5 is a bevel gear I4 cooperating with a similar bevel gear which is secured to vertical shaft IS. A bevel gear [6 at the lower end thereof cooperates with a similar bevel gear which is secured to hook shaft I1 located under the bed of the sewing machine and having a hook 18 at the forward end thereof in cooperative relationship to the needle bar [3. A belt shifter l9 having an opening 29 for the belt is secured on slide 2| by bolt 22. The slide moves in guide 23 and has a diagonal slot 24 therein.

A stop member 25 is adapted to be held in recess 26 of member 5. Said stop 25 is provided with a pin 21 operating in slot 24. The lower end 28 of stop 25 hasa pivot 29 carrying a rod 30 which is secured to a foot pedal or the like. The cover 3| 'of guide 23 has a vertical slot 32 therein to allow movementpf pin 21. I

The stop member has secured thereto a bar 33 having an angular extension 34 passing through a sleeve 35, having a spring therein and supported in bracket 36 with an adjusting screw 31 for varying the tension of said spring. Cooperating with the bar 33 is a latch 38 having shoulders 39 and 49 for holding bar 33 in two different posi- Said latch extends upwardly and is pivoted to the frame of the machine at 4|. The upper end thereof ispivoted to the arm 42 at 42 and the lower end of arm 42 is also pivoted at 42. Horizontally extending arm 44 forms a crank with arm 42' and said crank is pivoted to the frame at 43. I

At the top of the standard 2 is a plate 45 carrying tensions 46 and having an oil cup 41 secured in the top thereof. Formed as part of said plate is. a relatively flat, oil reservoir 48 and a series of openings 49 in said plate allow oil from reservoir 48 to drip down'into the sewing machine as shown by dotted lines 50. Some of the oil drops onto gearing 5| from oneof the openings. Oil also, drips from another opening onto gear 52 and is carriedaround by said gear to additionally lubricate worm 53. v

In the bed of the sewing machine is provided a groove or trough 54 which acts as a recep- 55 tacle for drippings which may fall directly from one of the openings 49 onto the trough or it may be drippings which have first lubricated say the gear 5| and then dripped down into trough 54. Said trough has a series of openings 56 in the bottom thereof directly over hook shaft 11, thereby providing oil onto each of the essential parts of said hook shaft. At the lowest point of the enclosure or cover for the bed of the sewing machine is an opening 51 whereby oil which has accumulated in the sewing machine may be removed. This opening may be closed by a plug or the like to be opened at intervals in order to drain said cover, or there may be a drip cup secured thereto for continuously removing the used oil.

In one of the openings 49 is secured a piece of tubing 58 which extends forwardly and downwardly, making contact with bearing 58of shaft 5. This provides lubrication for the front bearing and the excess oil therefrom passes into the head 4 and lubricates the needle bar and associated mechanism. a

In another of the openings 49 is a piece of tubingGll which extends rearwardly and downwardly, discharging oil as shown at 6| onto the rear bearing of shaft 5. A piece of tubing 62 catches oil from the rear bearing and distributes it onto the stop mechanism and moving parts in the vicinity thereof.

The operation of the lubricating system is quite simple, itbeing necessary merely to see that there is sufiicient oil in reservoir 48 by at times noting the contents of oil cup 41. Some of the oil is distributed directly upon various moving parts by the dripping through the openings 49 so that those parts located directly below the reservoir 48 are continuously and directly lubricated. Excess oil therefrom is used in order to lubricate all of the parts of the sewing machine beneath the bed thereof.' The catching of the used oil from opening 51 allows great economy in the use of oil, as-the same may be returned to the reservoir 48 for reuse, either with or without filtration. V

Although I have described my invention setting forth a single embodiment thereof, .it is quite apparent that my invention is not limited to the details set forth. For instance, the oiling system maybe placed differently from thatshown in Fig. 1 and the reservoir 48 maybe of different character. The various parts which require lubrication may be quite different from those illustrated in Fig. 1 and some of the moving parts may, of course be eliminated and others may be introduced, depending upon the specific construction and nature of the machine. The important element is thatone provides an automatic lubricating system which operates partly by drip and partly by conduit to automatically lubricate the entire machine.

From the above it will be realized that the present invention is not to be limited to. the specific detailsherein set forth, but that the description should be taken as illustrative of the principle involved herein. The invention is, therefore, not to be limited except by the claims appended hereto.

What I claim is:

1. In a sewing machine comprising a bed, a standard adjacent one end of the bed and having anoverhanging arm terminating in. a head adjacent the other end of the bed, a horizontal main shaft journalled in bearings in said standard and overhanging arm and operatively conreservoir to said bearings in the standard and overhanging arm, an oil drip collecting trough in said bed longitudinally of and directly above said hook shaft and extending into the bottom of said standard for collecting dripped oil from said driving mechanism, and a plurality of oil drip openings in the base of said trough for lubricating said hook shaft and parts supporting same.

2. In a sewing machine comprising a bed, a standard adjacent one end of the bed and having an overhanging arm terminating in a head adjacent the other end of the bed, a horizontal main shaft journalled in bearings in said standard and overhanging arm and operatively connected with driving mechanism located in said standard and overhanging arm, a hook shaft substantially parallel to said main shaft located beneathsaid bed; the improvement which comprises an oil reservoir disposed at the upper end of said standard and including a base plate closing the upper end of the standard, a plurality of oil drip openings in said plate directly above said main shaft and spaced longitudinally thereof for gravity lubrication of said driving mechanism, an oil drip collecting trough in said bed directly above said hook shaft and extending into the bottom of said standard for collecting dripped oil from said driving mechanism, and an oil drip opening in the base of said trough for lubricating said hook shaft. v

3. In a sewing machine comprising a bed, a standard adjacent one end of the bed and having an overhanging arm terminating in a head adjacent the other end of the bed, a horizontal main shaft journalled in bearings in said standdard and-overhanging arm and operatively connected with driving mechanism located in said standard and overhanging arm, a hook shaft substantially parallel to said main shaft located beneath said bed; the improvement which comprises an oil reservoir disposed at the upper end of said standard and including a base plate closing the upper end of the standard, a plurality of oil drip openings in said plate directly above said main shaft and spaced longitudinally thereof for gravity lubrication of said driving mechanism, an oil drip collecting trough in said bed directly above said hook shaft and extending into the bottom "of said standard for collecting dripped oil from said driving mechanism", and an oil drip opening in the base of said trough for lubricating said hook shaft, conduits extending from said reservoir to said bearings on the standard and overhanging arm, and means for collecting oil from said bearings and directing the same to mechanism below and adjacent to said bearings. V

JACOB BRUSSELL. 

